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首页> 外文期刊>Environmental Science & Technology >Argon Concentration Time-Series As a Tool to Study Gas Dynamics in the Hyporheic Zone
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Argon Concentration Time-Series As a Tool to Study Gas Dynamics in the Hyporheic Zone

机译：氩气浓度时间序列作为研究高渗区气体动力学的工具

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摘要

The oxygen dynamics in the hyporheic zone of a peri-alpine river (Thur, Switzerland), were studied through recording and analyzing the concentration time-series of dissolved argon, oxygen, carbon dioxide, and temperature during low flow conditions, for a period of one week. The argon concentration time-series was used to investigate the physical gas dynamics in the hyporheic zone. Differences in the transport behavior of heat and gas were determined by comparing the diel temperature evolution of groundwater to the measured concentration of dissolved argon. These differences were most likely caused by vertical heat transport which influenced the local groundwater temperature. The argon concentration time-series were also used to estimate travel times by cross correlating argon concentrations in the groundwater with argon concentrations in the river. The information gained from quantifying the physical gas transport was used to estimate the oxygen turnover in groundwater after water recharge. The resulting oxygen turnover showed strong diel variations, which correlated with the water temperature during groundwater recharge. Hence, the variation in the consumption rate was most likely caused by the temperature dependence of microbial activity.
机译：通过记录并分析低流量条件下一段时期的溶解氩，氧气，二氧化碳和温度的浓度时间序列，研究了一条高寒河流（瑞士图尔）的流变带中的氧气动力学。一周。氩气浓度时间序列用于研究流变区中的物理气体动力学。通过将地下水的狄尔温度演化与测得的溶解氩浓度进行比较，可以确定热量和气体的传输行为差异。这些差异很可能是由于垂直传热影响了当地的地下水温度。通过将地下水中的氩气浓度与河流中的氩气浓度互相关，还可以使用氩气浓度时间序列来估算出行时间。量化物理气体传输所获得的信息用于估算补给水后地下水中的氧气转化率。产生的氧气周转量显示出强烈的狄尔变化，这与地下水补给过程中的水温相关。因此，消耗率的变化最有可能是由于微生物活动的温度依赖性引起的。

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  • 来源
    《Environmental Science & Technology》 |2013年第13期|7060-7066|共7页
  • 作者

    Lars Machler; Matthias S. Brennwald; Rolf Kipfer;

  • 作者单位

    Department of Water Resources and Drinking Water, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland,Institute of Biogeochemistry and Pollutant Dynamics, ETH Zuerich, Switzerland;

    Department of Water Resources and Drinking Water, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland;

    Department of Water Resources and Drinking Water, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland,Institute of Geochemistry and Petrology, ETH Zuerich, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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